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20121120
20121120
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to use to replace the one that broke last august causing the fire. as kron 4's dan kerman reports, investigators are not convinced they are using the best available technology. >> reporter: preliminary findings suggest corrosion caused the pipe to rupture. they asked for a permit to replace the pipe with something better. 9% chromium steel alloy. but they aren't sure that is what is best. >> this alloy is 9 chrome, can be susceptible to what is called sulfaidation corrosion. >> the same type of pipe was involved in a fire in washington state. >> that doesn't prove it is not a good choice but it prompts more question about corrosion. >> reporter: they want chevron to explain why they are not using stainless steel with 18% chromium. >> hard to predict how fast corrosion occurs. that is why it is so important to use the safest possible materials in the piping. they have issued chevron a subpoena. they have till december 7 to answer the questions, specifically, about their decision making process, why they chose one type of pipe instead of the other. dan kerman, kron 4 news. >>> so f
Search Results 0 to 0 of about 1